Clutch for power-plow-lifting mechanism.



W. L. WALTON.

CLUTCH FOR POWER PLOW'LIFTING MECHANISM.

APPLICATION FILED 05c. 24. 1913.

l ,l5@,795. Patented Aug. 17, 1915.

3 SHEETSSHEET I.

Y W. L. W'ALTON.

CLUTCH FOR POWER PLOW LIFTING MECHANISM.

APPLICATION FILED DEC.24 I913.

Patented Aug. 17, 1915.

3 SHEETS-SHEET 2.

f/v VE/V TUE 4/ L ZL/AL 7174 W. L; WALTON.

CLUTCH FOR POWER PLOW LIFTING MECHANISM.

APPLICATION FILED 050.2 1.1913.

1,159,795 Patented Aug. 17, 1915.

3 SHEETS-SHEET 3.

Ian-mum -11 I A1. L MHLTUN HTTY'S WILLIAM L. WALTON, or BANTRY, NORTHDAKOTA.

CLUTCH FOR POWER-PLOW-LIFTING MECHANISM.

Original application filed June 12, 1912,

To all whom it may concern Be it known that I, WILLIAM L. WAL'roN, acitizen of the United States of America,

' and resident of Bantry, in the State of North Dakota, in the UnitedStates of America, have invented certain new and useful Improvements inClutches for Powers -and the objects of the invention are to generallyimprove and simplify the construction of the clutch and better adapt 1tto perform the functions required of 1t and to satisfy the conditionsmet with in actual practice. Such clutch is designed principally to beused in connection with the plow described and shown 'in my applicationSerial No. 703,239, filed June 12th,. 1912. To understand its operationhowever it will be necessary to describe in detail the mechanism inconnection with which it is used. This mechanism is covered by myapplication Serial No. 703,239, and other divisional applications ofeven date herewith. Serial Nos. 808,619 and 808,620.

The present application is a division of my aforesaid application Sr.No. 703239.

Figure 1 is a side elevation of the machine. Fig. 2 is a plan viewthereof. Fig. 3 is an .elevational detail to an enlarged scale of theblocks on the crank shaft, showing the projecting arms connected to thestraight shaft having rollers on their ends engaging the blocks, andalso the plow beams connected to boxes surrounding the crank shaft. Fig.4 is a side elevation showing the bell crank lever and means forrestoring the left wheel to the same level as the right Wheel when theplows are inoperative. Fig. 5 is a plan view showing the sub-frame towhich the left traction wheel is connected. Fig. 6 is a detail view ofone of the plates connected to the end crank on the crank shaft. Fig. 7is a side View of the cam wheel showing the circular corru-' gations onthe innerside periphery and also the worm engaging the teeth on theoutside periphery. Fig. 8 is a side View of the disk and trip dog. Fig.9 is a plan view of the disk and cam wheel. Fig. 10 is a detail showinga side view of the front ends of the plow beams with rollers dischargedto .thereon. A

thereof.

Specification of Letters Patent. Patented Aug. 17, 1915- Serial No.703,239. Divided and this application filed December 24, I 1913. SerialNo. 808,621.

glide in suitable cams. Fig. 11 is a perspective view of the clutchmechanism. I

In the drawings like characters of reference indicate correspondingparts in each figure.

1 is the main frame. 2 are the traction wheels, one of which isjournaled to the sub-frames 3.

4 is a power plant and 5 transmission gear and 6 the counter shaftextending crosswise of the frame having sprockets 7 8 are sprockets onthe traction wheel axles.

10 are chains connecting the sprockets 7 and 8.

11 is the rear guiding wheel suitably pivoted to the main frame.

12 is the crank shaft extending crosswise of the frame having bearings13 thereon.

14 are boxes surrounding the crank shaft and connected by the beams 15to the plows 16'.

17 is a disk keyed tothe crank shaft having two notches.18 in 'theoutside periphery 19 is a trip dog having a trip lever end 20 on theinnerside of the disk and a roller end 21 on the outside thereof.

22 is a spring for keeping the roller end in contact with the circularprojection 24.. i 23 is a gear wheel having circular projections 24 onits inside periphery and gear teeth 25 on its outside periphery meshingwith a .worm 26 on a shaft suitably driven by the engine or other sourceof power.

27 is a straight shaft having suitable bearings 28 on the main frame anda foot pedal 29 suitably connected thereto.

30 are blocks adjustably secured to the crank shaft 12.

31 are projecting arms suitably secured to the straight shaft 27 havingrollers 32 at their forward ends engaging the aforesaid blocks.

33 is a trip fork secured to the straight shaft 27. In case the seat ofthe operator 34 is in some other position thanposition connecting theends of the two arms by a suitable rod.

36 is a bracket secured to the main frame,

37 a stop do held in contact with the outerperiphery 0 the disk 17 bythe spring 38, said stop dog engaging the notches 18 in the outsideperiphery of the disk and. preventing the same from turning in onedirection. The trip fork 33 has two arms, the one 42 having a hook end43 and the other 44 having a stub end 45 so arranged that in operationeither the hook end or the stub end will arrest the trip dog 19 and stopthe forward revolving of the crank shaft 12.

In operation it will be no doubt desirable to have the stopping pointsof the crank slightly before the perpendicular center of revolution isreached.

The operatiorfof the raising and lowering device is as' follows:Assuming that the plows are in the lowered position as shown in Fig. 4,and it is desired to raise them, the wheel 23 will run loosely on ashaft 12 at a slow speed in the forward direction, being driven from theworm'26. The operator will press on the toe of the foot pedal 29 whichwill throw the stub or lower end 45 of the trip fork 33 and also the twolocking arms 31 downwardly, releasing the trip dog 19 so that the rollerof the said dog will drop into the corrugations 24 of the driving gearwheel 23, which will immediately start the crank to revolve, the arms 31dropping sufficiently to clear the crank in its revolution. Thismovement will cause the hook end 43 of the trip fork 33 to drop intoposition so it will catch the trip dog 19 when it reaches the upperposition and stop the further revolution of the crank 12 until theoperator desires to lower the plows, when he will press downethe heel ofthe pedal 29, releasing the hook end of the trip arm 33, when the crankshaft will again rotate and complete the other half of the revolution,this action of the operator-having brought the stub end 45 of the tripfork 33 into position to intercept the trip dog at its lower ositionandat the same time bringing the ocking arms 31 up into position to lockagainst the stop blocks 30.

The sub-frame 3 is a rectangular shaped .yoke with its forward and openend formed with a large circular hole. w.

46 are brackets secured to the main frame formed so 'as tosurround thetransmission counter shaft which is arranged so that the ends of thesub-frame fit over the circular part of the same, which extendsinwardly. The forward ends of the sub-frame are held in place by collars47 also set on the brackets 46 to hold the frame in place. Thisarrangement allows the lowering and raisingthe sub-frames and areintended to hold the tween the main frame bars.

ofi'set at 53 so that the outsides of the rollers will pass between themain frame bars. The rollers 52 rest upon the sub-frame 3 near its rearend and when the sub-frame is in its most elevated position itrestsfirmly against the bell cranks directly below the pivots of the brackets49. An additional crank 54 is formed on the end ofthe crank shaft 12,this crank being set at approximately right angles to the plow liftcrank. A plate 55 having a hollow boss 56 at itsrear end is designed tobe pivotally secured to the crank 54, having adjustment holes 51.

58 are connecting bars havin their rear ends secured at each side of t eplate 55,

and their forward ends pivotally connected to the upper ends 51 of thebell crank levers. 1

In operation the traction wheels will be adjusted by a worm wheelraising and lowering device in the rack bars 59 inorder to adjust thesame for the depth of plowing reached and the plows are to be thrown outby the lifting device before described, the half turn of the crank shaft12 will throw the crank 54 into rearward position, pulling required.When the end of the field is the top end of the bell cranks51*,backwardly as shown in the dotted lines in Fig.

4, thus throwing the rear end of the subframe 3 downwardly, carrying theleft traction wheel down to the level of the right traction wheel, as inthe one movement of the raising and lowering device. When the turn atthe end of the field has been made, the other half revolution will allowthe subframe 3 to return to its normal position be- It will beunderstood that the sub-frame 3, is only applied to the left hand orland wheel 2, the right hand or, furrow wheel rack bars are boltedsolidly to the frame.

From the above description it will be seen that the advantages of theraising and lowering will be great. Further as soon as the raisingoperation is started, it will be seen that the movement of the plowbackward pulls the roller up a long incline of- .the cams 41, raisingthe points of the shares so that the plows cut their way out of theground as they should do. By the time-the crank has traveled backwardfor a requisite distance, the roller will have reached the top of theincline in the cams and the rear end of the plows will come more rapidlyupward as the cam reaches the straight backward part of its revolution,finally passing to the full elevated position, the

rollers traveling out to the end of the cam in the upper position, therollers will be at a rest, near the top of the incline part of the camand as soon as the plows require to be let into the ground, the forwardmovement of the crank 12 will force the rollers down the incline of thecam 41 so that the points of the shares will dip down in and take theground very readily and the action of the forward and downwardrevolution of the crank will set the plows down with a sweeping movementuntil they are finally in the ground in operative position. It will beseen, should the plows strike a rock or other obstruction, the trip willbe thrown. automatically and the plows raised clear of the obstacle.

What I claim as my invention is:

1. In a clutch, in combination, a rotary member having an annular seriesof projections, a shaft, a connecting member on the shaft fixed thereto,a spring actuated dog on the member having means normally engaging withthe projections on the rotary members to thereby connect the rotarymember and the connecting member, a double ended pivoted fork, the endsof which are adapted to disengage the dog at two points in its travel.

2. In a clutch, in combination, a rotary member having an annular seriesof projections, a shaft, a connecting member on the shaft fixed thereto,a spring actuated dog on the member having means normally engaging withthe projections on the rotary members to thereby connect the rotarymember and the connecting member, a double ended pivoted fork, the endsof which are adapted to disengage the dog at two points in its travel,and means for preventing retrograde movement of the connecting member.

3. A clutch for the purpose specified comprising a gear havingprojections, a disk having notches in the periphery, a dog on the diskadapted to engage with the projections to thereby connect the gear andthe disk and cause them to rotate together, means for releasing the dogfrom the proj ections at predetermined points in the revolution, aspring actuated arm adapted to engage the notches in the periphery ofthe disk.

l. In a plow, a crank shaft, a clutch comprising a disk keyed to thecrank shaft having a .trip dog thereon with a trip lever end on theinside of the disk and an end extending through the disk to the outsidehaving a roller mounted thereon, a spring for holding the trip dogoutwardly from the center of the disk, a fork rod having one prong witha hook end designed to engage a trip dog on the disk, and the otherprong having a stub end designed to engage the trip dog,

a dog pivoted to a bracket on the main frame and held in engagement withthe periphery of the aforesaid disk by a suitable spring, said diskhaving two notches in the outside periphery and a cam wheel looselymounted on the crank shaft and having gear teeth on its outsideperiphery and circular corrugations on its inner periphery, said camwheel being suitably driven from a suitable source of power, a springfor holding. the said roller on the trip dog into engagement with thecircular corrugations until the crank shaft is turneda requisite extent,said forked rod throwing the roller out of engagement at the requiredpoint, as and for the urpose specified.

5'. In a p ow, the combination with the crank shaft of a clutch comrising a disk keyed to the crank shaft havlng a trip dog thereon with atrip lever end on the inside of the disk and an end extending throughthe disk to the outside having a roller mounted thereon, a spring forholding the trip dog outwardly from the center of the disk, a fork rodhaving one prong with a hook end designed to engage a trip-dog on thedisk, and the other prong having a stub end-designed to engage the tripdog, a dog pivoted to a bracket on the main frame and held in engagementwith the periphery of the aforesaid disk by a suitable spring, said diskhaving two notches in the outside periphery, a, cam wheel looselymounted on the crank shaft and havin gear teeth on its outside peripheryand clrcular corrugations on its inner periphery, said cam wheel beingsuitably driven from the engine, a spring for holding the said roller onthe trip dog in engagement with the circular corrugations until thecrank shaft is turned a requisite extent, said forked rod throwing theroller out of engagement at the required point and a cross shaftsituated behind the crank shaft and having a suitably connected footpedal thereon, said fork rod being secured to the cross shaft, as andfor the purpose specified.

6. In a plow, the combination with the crank shaft of a clutchcomprising, a disk keyed to the crank shaft having a trip dog thereonwith a trip lever end on the inside of the disk and an end extendingthrough the disk to the outside having a roller mounted thereon, aspring for holding the trip dog outwardly from the center of the disk, afork rod having one prong with a hook end designed to engage a trip dogon the disk, and the other prong having a stub end designed to engagethe trip dog, a dog pivoted to a bracket on the main frame and held inengagement with the periphery of the aforesaid disk by a suitablespring, said disk having two notches in the outside periphery, a gearloosely mountedon the crank shaft and having gear teeth on its outsideperiphery and circular corrugations on its inner periphery; said gearbeing suitably driven from the engine, a spring for bold ing the saidroller on the trip dog into engagement with the circularcorrugationsuntil the crank shaft is turned a requisite extent, said forked rodthrowing the roller out of engagement at the required point, a

cross shaft situated behind the crank shaft and having a suitablyconnected foot pedal 7 thereon, said fork rod being secured to the crossshaft, blocks on the crank shaft hav In witness whereof I have hereuntoset 2 my hand in the presence of two witnesses. WILLIAM L. WALTON.

Witnesses:

1 H. M. WALTON, NELs MELoos:

